The nature of the metal-rich thick disk

(2) Lund Observatory; Ann Arbor; A.R. Zenn (1); M.S. Oey (1); S. Feltzing (2) ((1) Dept of Astronomy; Sweden); T. Bensby (1); University of Michigan; USA

arxiv: astro-ph/0612459 · v1 · submitted 2006-12-16 · 🌌 astro-ph

The nature of the metal-rich thick disk

T. Bensby (1) , A.R. Zenn (1) , M.S. Oey (1) , S. Feltzing (2) ((1) Dept of Astronomy , University of Michigan , Ann Arbor , USA , (2) Lund Observatory

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keywords diskstarsthickmetallicitiesassociateddatedwarfeither

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We have traced the Galactic thick disk to its, to date, highest metallicities. Based on high-resolution spectroscopic observations of 187 F and G dwarf stars that kinematically can be associated either with the thin disk (60 stars) or with the thick disk (127 stars), we find that the thick disk stars reach at least solar metallicities, and maybe even higher. This finding is independent of the U_LSR, V_LSR and W_LSR velocities of the stars.

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The nature of the metal-rich thick disk

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